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common/rfb/Logger.h

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+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger.h - The Logger class.
+
+#ifndef __RFB_LOGGER_H__
+#define __RFB_LOGGER_H__
+
+#include <stdarg.h>
+#include <stdio.h>
+
+// Each log writer instance has a unique textual name,
+// and is attached to a particular Logger instance and
+// is assigned a particular log level.
+
+#ifdef __GNUC__
+#  define __printf_attr(a, b) __attribute__((__format__ (__printf__, a, b)))
+#else
+#  define __printf_attr(a, b)
+#endif // __GNUC__
+
+namespace rfb {
+
+  class Logger {
+  public:
+
+    // -=- Create / Destroy a logger
+
+    Logger(const char* name);
+    virtual ~Logger();
+
+    // -=- Get the name of a logger
+
+    const char *getName() {return m_name;}
+
+    // -=- Write data to a log
+
+    virtual void write(int level, const char *logname, const char *text) = 0;
+    void write(int level, const char *logname, const char* format, va_list ap) __printf_attr(4, 0);
+
+    // -=- Register a logger
+
+    void registerLogger();
+
+    // -=- CLASS FIELDS & FUNCTIONS
+
+    static Logger* loggers;
+
+    static Logger* getLogger(const char* name);
+
+    static void listLoggers();
+
+  private:
+    bool registered;
+    const char *m_name;
+    Logger *m_next;
+  };
+
+};
+
+#endif // __RFB_LOGGER_H__